Apparatus for the manufacture of tubing.



P. PATTERSON. APPARATUS FOR THE MANUFACTURE OF TUBING.

' APPLICATION FILED $591.15. 1911. 1; 1553 Patented 001. 5, 11115.

'3 SHEETS SHEET 1.

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P. PATTERSON. APPARATUS FOR THE MANUFACTURE OF. TUBING APPLICATIQN FILED SEPT-I5. I911.

Patented M. 5, 1915.

3 SHEEIS SHEET 3.

WITNESSES W iii/66x.

PETEH' PATTERSON, F PITT$BURGEL ENNSYLVANIA; SAFE 1915390 311 AND TRUST COMPANY OF PITTSBURGH EX'EQ UTOR 0F $15.11) PATTERSON, DEGEASEI).

APPARATUS FUR THE MANUFACTURE TUBING.

Specification of Letters Eatent Patented @ct. 5T5,

Application filed $eptember 15, 1911. Serial No. 649,460.

To all whom it may concern:

Be it known that 1, PETER Pn'r'rnnson, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for the lilanui acture of Tubing; and I do hereby declare the following to be a full, clear and exact description thereof.

My invention relates to apparatus for the manufacture of tubing, its objects being to increase .the output and the quality of the pipe, andto produce a larger proportion of first quality pip and to that end toprovide apparatus for more uniform and rapid operation by Pl'OVldlllg a full supply of slrelp for the welding furnaces, at a uniform heat, and to provide' 1t'or the proper finishing of the pipe so to deliver them to v the threading machines in true cylindrical form and so do away "with the necessity of the roundingot the pipe ends for threading, and yetcare for all the pipe welded so that large outputs can be obtained, as well to improve the apparatus in other Ways.

To these ends my invention comprises apparatus for the manufacture of tubing including a double bendingfurnace, single feeding and bending apparatus operating therewith, a single welding furnace, a single feeding, and welding apparatus operating therewith, and multiple cross roll finishing machines providing for the finishing of the welded pipe at a slow for 'ard feed and ye taking care of all the pipe that can be produced in the welding furnaces, as Well as allowing for increased production.

lit also compri es certain other improvements as hereinai'ter more particularly :lt'orth and claimed.

in the accompanying drawings Figure '1 is a. plan view of the tube makin apparatus embodying my invention; Fi is a like plan view of a modification of the apparatus; Fig. 3 is a plan view illustrating a modified arrangement of the cross roll finishing mechanism; Fig. l is a crosssection of the prefe red form of bending furnaces; Fig. 5 is an enlarged view of the finishing rolls; and Fig. 6 a cross section e the same.

@ne formpf apparatus involving my in vent-ion illustrated in Fig; 1 in which 1, 2, are the bending furnacesset side by side in which theskelp plates are heated, the drawing showing tour plates on each hearth. 5 is the plate charging 'inaehine adapted to travel laterally across the il uont oi the fur-- naces. and 4 is the scarling machine also traveling laterally across the rear of the furnace. 5 is the bending machine which can be of any desired form. The bending machine 5 delivers the skelp onto the rack G from which they are charged by the pusher 7 into the welding furnace 8. The welding machine 9 is illustratedL as traveling laterally at the back of the Welding furnace, which furnace is shown as having two ports, and is illustrated with two skeip resting in line with said ports so that they may be pushed into the rolls which are moved into line with the ports. 'lhe welding ma chine has the rolls it) and the receiving trough 11 and bar puller 12. The sizing machine 13 at the side of the welding niachine is formed of two concave rolls power driven, having the receiving troughl-l in front thereof, and the delivery trough 15 leading therefrom to the cross roll finishing machines. I. employ two sets of finishing rolls 113, 17, having the feeding troughs 18 and 19 in front of them troughs Q0 and 21 in line rolls, and between said the delivery trough 22 leading to th cooling table i v 1 prefer to provide the cross roll finish mg machines with rolls of as great length as xracticable, for example, as long as eigihteen feet for large pipe, a lid they are made to feed the tubing through the same at a slow speed, practically all about one-half the speed now employed. For example, the travel of the pipe through the finishing rolls as now en'rployed is about 5-,; inches per revolution of the rolls, that speed being: necessary to take care of the piedrujrtiou oi the welding furnace wiere only a single st or finishing rolls is employed. The finishing rolls as preferably employed in my invention operate at a longitudinal feed of the pipe of about 2 to 3 inches per revolution oi the rolls, this being aceon'iplished by the angular position or; set of the rolls and by the concavity given thereto. As shown in' the enlarged view Fig. 5., and the cross section Fig. (3 o:': the fiiiishing rolls, each set is formed of two rolls 2% set diagoand the receiving with the finishing receiving troi'lghs' nally and slightly concave, and between them is the pipe support '25, so located that as the pipe is rotated by the rolls it contacts with the surface of the support for the purpose hereinafter described.

In the use of the apparatus as illustrated in said figure the plates are charged into the two bending furnaces alternately, for example, four plates upon the hearth of each furnace, and in the regular operation as soon as one furnace is so charged the doors 26, 27, of that furnace are closed so that the plates therein are subjected to a high steady heat and all cooling of the furnace by the entrance of air through the doors prevented until the plates are brought up nearly to the temperature at which they are to. be delivered from the furnace. Each furnace can be made much narrower than the single bending furnace now employed where the hearth is made wide enough to receive, say, six plates, and in this way I am enabled to increase the number of plates heated for bending mto skelp by, say, one-third. furnaces, however, a

the employment of two higher heat can be maintained in each one because the hearth is narrower and the furnace can be operated to carry the flame and r heat entirely across the hearth and to reheat the checker work of the regenerators, overcoming the necessity of forcing the furnace by a strong draft, and carrying a greater heat back into the furnace when it is reversed. A higher heat is thus generated because the flame and heat are not required to travel so great a distance over the hearth, while as the doors of the furnace can be kept closed for a much longer period, overcoming the sucking in of air through the same, a much higher and more uniform heat" is produced and the plates in each fur'hace can the proper bendbe more 'quickly raised to ing heat. After the plates are first charged into the bending furnace the doors of the furnace are closed while the plates are being withdrawn from. the other bending furnace, the charging and scarfing, or *tcarfing and bending apparatus being moved laterally into line with the plate, and they are pushed from the furnace in the ordinary way. As soon as the plates have all been fed from that furnace, for example, from the furnace 1, the charging and scar-ling mechanism is moved into line with the other furnace 2 and the plates fed therefrom as needed, the first furnace 1 being re-chargod with plates and the doors closed, subjecting the plates in the furnace to the high heat thereof without disturbance by the entrance of air while the plates from the second furnace are being formed into skelp. In this way a full supply of skelp at a high uniform heat may he provided for the single welding furnace 5%, being delivered on the rack (3 and carried down in proper position for feeding into the the welding rolls of the welding machine onto the trough 11,-the mandrel bar is withdrawn by the mandrel bar puller '12 and the pipe delivered laterallyjoverintothe trough let and th'enpassed; through the sizing machine 13 into the trough 15. They are cars: ried along this trough and delivered alternately to the troughslS and 1 9 of the finishing rolls 16 and 17, each alternate pipe passing through the same set of finishing rolls into their receiving troughs 20 or 21, and being then delivered into the delivery trough 22 and thence to the cooling table. As ,each set of finishing iolls receives only each alternative pipe, and as these rolls are operated at a very slow speed, even though the apparatus is able to take care of all the pipe welded the pipe are subjected to prolonged cross roll finishing at slow forward feed, being cooled not only by the absorption of the heatfromthe pipe by the finishing rolls but by water cooling over their surfaces such by the spray pipe 24: as shown in Fig. 6 so that in the prolonged cross roll finishing they are brought down to a low temperature, being first brought to too true cylindrical shape and as held within said rolls until set, so that they are much .below thetemperature at which they would be liable to sag and lose shape when on the cooling table. In this slow cross roll fin ishing the surfaces of the pipe are carried continually over the pipe support of the fin ishing rolls and contact of thepipe surface with such pipe support is practically doub'led because of the slow feed of the pipes through the finishing rolls, thus scraping ed the scale from the pipe, forming smooth surfaces thereon free from scale and in fact largely polished. In this treatment the pipe are brought down to a temperature below the ordinary scaling heat, that is, to a temperature in the neighborhood of or below 10 O0 Fah. and the exposure of the smoothsurfaces formed on the pipe, under the water cooling and the expos'ure to the atmosphere leadsito the formation of a permanent oxid coating on the pipe which protects the same from rapi corrosion. ,In '50 operating I provide practically theeame conditions as are present in the formation of polished sheet iron, the slow finishing leading to the scraping and removal from the bodies of the pipe of the scale formed by the high heat of the welding furnace, and

the finishing); led inio th issuer? absorbing the heat from the pipe in such a. way when it leaves the finishing rolls iiis *ie proper {temperature for formation of such permanent oxid coating which is ;;1radually formed thereon in the .iurther cooling on lhe cooling table.

e pipe past 'ng through the sizing rolls ed into the trough 1e and passes through rolls 16 while the UGXC pipe trough l5) and passes through rolls 1?, and thus the two .ie of finishing rolls are acting on two (lif lerenl pipes at the same lime, so that 1 am enabled to apply this prolonged crossroll finishing-r at slow forward feed while taking care of as many pipe as are produced by the welding furnace, the racks between the trough leading from the sizing rolls and the troughs leading to the cross rolls providing storage, so that the welding and sizing may proceed even in case of delay in finishing. llhe slow cross roll finishing brings she pipe to such low heat that fihey are set, and as f'she nine pass onto the eooling table they are not liable to bend or worn in the further cooling); thereof, and they retain their true cylindrical form, and therefore it is unnecessary to subject them. to the roundingup treatment in the threading machines before being threaded, and the production from rho fibre-ailing 1" achines is thereby very inc. while better pine is formed because lhe cryslallizing action due so the cold reunqling up process is done away with.

i the lie ishiugr i am thus enabled to obtain a much greater production because I am enabled to provide all i316 skelp that the welding furnaces can sake care of and feed the slielp to 'the fun noses at a higher temperature, and .1 am enabled. to roll. finish the same so perlec ly that practical none of the pipe will require a second healing and pass lhrough the welding rolls on account of being out oi round or crooked when (ilelivered from the i .g liable, and at the same time obtain oer advanlage above set forlvh. l v. ain such advantages without extra cos as no more labor is required in the bending or finishing; operae apparalus illustrated in Fig. is more ';;;sarsieularly adapled for the forming of pipe. for example. pipe leu inches in and larger. In 2 I have 3i, va a plant for practicing: the invention is more particularly adapted for Log smaller pipe where a larger numa e made, the same parts illustrated in ig. 2 having the same reference nurcls, and I will only refer to the mechsin as changed. For example the eare Ellis illustrated as carrying: both the ling rolls 31 and the bending die 32, so I J; l-he searfecl olalie pas. es longitudinally all of lalzera 3: lo the l ma hine.

next pipe passes into the trough 19 and thence through the finishing rolls ill and through the second set of finishing rolls 3G. The apparatus is thus adapted to take care or a larger number of smaller sized pipe produced in the welding furnace prolonged cooling action being: obtained. or even a greater cooling action by such successive cross rolllinishing and the pipe being held within the finishing rolls a suliiciently long time lo insure their being set in true cylindrical shape.

Fig. 3 shows another variation in the arrangeinent oi the plant, illustrating three sets of cross roll finishing machines, shown at l0, and 42. In th s modification lhe welded pipe first p... arough the sizing rolls l3 and into lho trough ill. from which it passes (lirecl ly through the finishiugr rolls ll), which may be driven at lhc lull speed heretofore employed for this class of rolls. ll; then passes into the trough l and each alternative pipe passes in the trough 4-5 and through the finishing rolls 11., while lhe next pipe passes to the trough l6 and through lhe finishing rollslil. ln said rolls ll and E2 the pipe is subjected lo the prolonged cross roll finishing at slow s1 ed above described. and thus held loin-ac cfflin drical shape until set when is; is delivered in the way above described to the cooling table.

is evident ha-i l an! enabled lo ('IUs.

finish practically the same number of pipe a very much lower forward fee the cross rolls and without rho pip fE1l2lQ,\\llll each other. and so am e,. soled not only to hold the pipe within the Eu ishingz' machines unlil sci in true cylindz'ica sl ape and sul'lieienlly "vol to prevent bend ing or warping: the pipiin lhe further coolinp; on the cooling table. but by the slower forwz'rd feed pe revolution within the finishingr rolls in obtain a much greater con tact with the surface of the heated pipe with rhe pipe supports in the finishing rolls and thus remove practically all scalefrom the pipe, providing a more perfect sl'lrface thereof, and practically polishing the'pipe, and bring the pipe in passing from lhe finishing rolls to such low temperature that n, 1,1 case":

a permanent oxid is formed on its surface through the water used for cooling in the finishing rolls and subsequent exposure of the pipe on the cooling table.

The bending furnace illustrated in this application forms the subject of a separate application for patent filed of'even date herewith, Serial No. M9363. The arrangemcnt of finishing rolls set in tandem as illustrated in Fig. 2 of this application also forms the subject matter of a separate application for patent filed of even date herewith, Serial No. M9361.

What I claim is:

1. In apparatus for forming tubing, the

combination of two bending furnaces, a

single welding furnace and multiple finishing rolls and means to feed stock from said welding furnace to said rolls successively.

2. In apparatus for the manufacture of pipe, the combination of two bending furnaces side by side, single laterally moving charging and skelp forming apparatus adapted to cooperate alternately with each furnace, a single welding furnace, charging and welding apparatus cooperating therewith and multiple cross roll finishing machines and feeding and deliyery mechanism cooperating therewith to feed the stock thereto successively. Q

3. In apparatus for the manufacture of pipe, the combination of two bending furnaces side by side, single laterally moving charging and scarfing apparatus adapted to,

coiiperate with each furnace alternately a single welding furnace, charging andwelding apparatus coiiperating therewith and multiple cross roll finishing machines and feeding and delivery mechanism cooperating therewith to feed the stock thereto successively. I f

4:. In apparatus 'for the manufacture of tubing, the combination of two bending furnaces side by side, single laterally moving charging and bending apparatus cooperating therewith, a single welding furnace, charging and welding apparatus cooperating therewith, multiple cross roll finishing apparatus, and feeding and delivery mechanism cooperating therewith and adapted to feed the stock thereto successively.

5. In apparatus for the manufacture of tubing, the combination of two bending furnaces side by side, single laterally moving, charging and scarfing mechanisms adapted to cooperate therewith alternately, bending mechanism, a single welding furnace and charging-and welding mechanism cooperating therewith.

6. In apparatus for an manufacture of tubing, the combination of two bending furnaces sideby side, laterally moving charging and bending mechanism adapted to cooperate therewith alternately, a single weld ing furnace and charging and welding mechanism coiiperating therewith.

'i. In apparatus for the manufacture of tubing,,the combination of a single welding furnace, therewith, multiple cross-roll finishing machines and trough connections between the welding mechanism and the finishing mechanism adapted to feed the stockto said finishing machines successively.

8; In apparatus for the manufacture of tubing, the combination of a single welding furnace, welding apparatus cooperating therewith, sizing rolls, multiple cross-roll finishing machines and trough connections between the welding furnace and the sizing welding mechanism cooperating rolls and between the latter and the multiple cross-roll finishing mechanism adapted to feed the stock to said finishing rolls successively.

9. In apparatus for the'manufacture of tubing, the, combination with a single weld-' ing furnace, welding mechanism cooperating therewith, multiple cross-roll finishing machines, a single trough leading to the finishing machines,,and troughs in line withthe finishing rolls parallel Wlth the trough carrying the pipe to the finishing machines; In testimony whereof, I the said PETER PATTERSON have hereunto set my 'hand. PETER PATTERSON.

Witnesses:

Ronnnr C. To'rTnN, JOHN F. WILL. 

